Used tire, facing, stitching, and retreading machine



July 30, 1935- G. A. SCHMIDT USED TIRE, FACING, STITCHING AND RETREADING MACHINE Filed June 19, 1934 2 Sheets-Sheet 1 y 1935- a. A. SCHMIDT 2,009,524

USED TIRE, FACING, STITCHING AND RETREADING MACHINE Filed June 19, 1934 2 Sheets-Sheet 2 BY I fAM fW Patented July 30, 1935 UNITED STATES PATENT OFFICE USED TIRE, FACING, STITCHING, AND RETREADING MACHINE George A. Schmidt, Walnut Park, Calif.

Application June 19, 1934, Serial No. 731,295

6 Claims. (Cl. 164-38) This invention is a machine for pneumatic tire spindle 8 is adapted for reception of a wheel tire working, especially for preparing old tires as, pider. for instance, by the retreading thereof by the This spider consists of a set of radially adjustnovel method shown in my application filed June able l c s 9 p rat d y l k crew ll moti- 4, 1934, Ser. No. 728,907; or as in the common vated by suitable gearing having crank or 5 practice of stitching on a commercial wrap or Wrench shaft H all mounted in a gear box l2 lap of tire rubber known in the trade as a camel vin a hub 3 sui a ly fix d on h spindle 8. back, to be later vulcanized in any practical T pid block ID ar adjus a le t engage manner. one or another of various sizes of rims R of tires It is an object to provide a powerful and capa- T upon which work is to be done in prepar i n 10 cious machine to'which an operator (and a helper for pp a O a ew -tread y. W thus on very large tires) may apply one of limitless fi y ou d on the Spider the tire is p t sizes and types of rim-mounted tires to a spinning a si rate f sp e and th motor carriage 6 spider whereby the tire i spun on it axis; t is then shifted by its actuating screw I5 as the 5 machine incorporating m ans fo th ju tap operator turns the hand-wheel [6 ther of to bring :5 sition of the tire and an appropriate tool for the tread P Of the tire toward ch Working preparatory face work on th t Such tools tool I! as may have been fixed in a tool post I8. are adapted for cutting the undesired residue of The tool post i mounted on a Segmental block th worn tread down t the carcass, or in my l9 slidably fitting in an arcuate guide bed 0 ne process, tt a Channel in so much of the which is slidably adjustable along a tool carrier 20 old tread as may be available according to the 2| which is provided with a tool feed screw 22 condition f the tire engaging a nut part 20' of the tool bed 20; the

Also, an Object is tq provide means for the carrier having a longitudinal slot 22 in which quick and effective application of the camel back the nut Works to the prepared carcass The tool carrier is slidably mounted on a pair 25 In general, a broad object is to provide, in a of rails in the form of bolts 23 which connect single machine, means for greatly facilitating all main frame plates 24 25; the latter abutting the of the preparatory, manual work on an old tire adjacent frame plate and being solidly atwhich is in condition justifying its re treading tached thereto as by welded corner brace parts The invention consists in certain advancements The main fl Structure is thus subtam 30 in this art as set forth in the ensuing disclosure g g g g i tg gi g z f 2:3 5? g ggi T and having, with the above, additional objects and advantages as hereinafter developed, and g i gg ga i ggi g fig 32 g whose construction, combination and details of y e a 00 m 8 ans the bed may be moved in straight hnes so as to 5 the manner of Operatwn W111 be made out out a channel C as shown in the bod of manifest in the description of the herewith illusthe tire in Fig 5 forrecepfion of a mingled tratlve embodiment; it being understood that p i full-circle re-tread girdle G. modifications, variations and adaptations may be resorted to ithin the scope principle and When it is desired to trim ofi the old rubber of 40 spirit of the invention as it is more directly E 2 ;ii g g s gggfi ig rg g g l i n i ifi ififig fg f th hi 2a is applied to a pin 29 which is a part of the mm P i 6 He, as used tool bed block I9 and this is then worked back g a f 2 0 1 s t and forth in the channelled bed 20 in conformlgure 1S ront elevatlon thereof broken m ance with the circle of the tire carcass fabric F, 45

f the combined movement of the block and of the Figures 4 and are cross-sections, of a 0011- carrier 2| being used if necessary, with the feed vent onal tire, showing diiferent preparatory opof t m k d by it screw 22,

eratlOnS, as e forth hereafter- After the tire has been faced down to the cart d p form, thehlachine includes a cass, a coat of rubber cement is applied to the stiff and h avy fr me m ri a m r h tire face and it is ready for the application of having a pair of spaced, vertical side plates 2-3 th a el-back layer L, Fig. 4. A pressing or cross-connected by heavy bolts 4-5 which constitching roller 30, nowfixed on the tool post stitute parallel rails for' a carriage 6 on which I8, is then advanced by action of the bed 20 and 1s fixed a geared-down motor unit 1 whose driven the lateral motion of the carrier 2| and the layer L is firmly and uniformly worked down until its entire area of contact on the carcass is insured, and is done in a manner far superior to present day, indifferent handwork jobs and in far less time. The arrow in Fig. 4, indicated the sweep of the stitching roller during its pressing application.

The tire is subject to inflation pressure at all times while being worked on in the machine.

What is claimed is:

1. A used-tire working machine including, in combination, a tire centering spider, means to spin the spider and the tire carried thereby, means to shift the spinning spider, and mechanism for holding a tool adapted for work on the tire and for moving the tool to and from, and on the face of the tire to be worked on, said mechanism including an arcuate tool guide approximately concentric to the transverse tread curvature of a tire carcass and whereby the applied tool is guided transversely around the tread, and means to facilitate tool movement along the said guide.

2. A machine of the class described including a frame having sets of parallel rail bars which sets are at right angle to each other, a prime motor slidably mounted on one set of bars and carrying and driving a work chuck which overhangs one side of the frame to turn work clear of the frame side, a carriage slidably mounted on the other set of bars and disposed opposite to the work chuck, a tool slide mounted on the carriage for tools applicable to the work periphery, means to shift the motor toward and from the carriage, and means to shift the carriage transversely to the work chuck.

3. In a machine of the class described; a frame comprising a plurality of vertical plates forming frame legs, systems of horizontal bolt rods securing the plates in assembled relation, said rods including horizontal, top pairs in right angular relative position and forming rails, and apparatus-carrying slides operatively mounted on the pairs of rail rods, said slides being movable on paths at a right angle to each other, and one slide carrying a chuck which overhangs one side of the frame.

4. A machine'of the class described, including a frame having a pair of guideways, a prime motor slidably mounted on one of said guideways and having a chuck device overhanging one side of the frame to receive work and rotate it clear of the frame, a carriage slidably mounted on the other of said guideways, and a tool support adjustably mounted on the carriage and disposed on the chuck side of the frame and operative to move a'tool across the peripheral face of work onthe chuck said chuck and said carriage being independently operative on the guideways.

5. A machine of the class described, including a frame having sets of guides at a right angle to each other, a prime motor adjustable along one set of guides and carrying and driving a work chuck which overhangs one side of the frame to carry work laterally clear thereof, and a carriage mounted on the other set of guides and having a tool support disposed on the chuck side of the machine for carrying and moving a tool across the adjacent face of work on the chuck.

6. A machine, of the class described, including a frame, a prime motor having a chuck device on its shaft overhanging one side of the frame to receive and rotate work clear of the frame, and a tool support; said frame having guideways upon which the tool support and the said motor are relatively movable to vary the relation between the chuck and the tool support toward or from and transversely to the work on the chuck, the guideways for the motor consisting of a set of parallel rails on which it is adjustably mounted.

GEORGE A. SCHMIDT. 

